Materials | Pro Steel Solutions

Mild steel S275 / S355
Thickness	Amperage	Cut speed	Smallest clean hole
3 mm	45 A	3,400 mm/min	Ø 6 mm
6 mm	65 A	2,400 mm/min	Ø 6 mm
10 mm	105 A	1,800 mm/min	Ø 10 mm
15 mm	130 A	1,300 mm/min	Ø 15 mm
20 mm	200 A	1,400 mm/min	Ø 20 mm
25 mm	200 A	1,000 mm/min	Ø 25 mm
30 mm	260 A	900 mm/min	Ø 30 mm
50 mm	400 A	380 mm/min	Ø 50 mm

Stainless 304 / 316
Thickness	Amperage	Cut speed	Smallest clean hole
3 mm	45 A	2,800 mm/min	Ø 6 mm
6 mm	65 A	1,600 mm/min	Ø 6 mm
10 mm	105 A	1,100 mm/min	Ø 10 mm
15 mm	130 A	700 mm/min	Ø 15 mm
20 mm	200 A	800 mm/min	Ø 20 mm
30 mm	260 A	450 mm/min	Ø 30 mm

Aluminium
Thickness	Amperage	Cut speed	Smallest clean hole
3 mm	45 A	4,200 mm/min	Ø 6 mm
6 mm	65 A	3,000 mm/min	Ø 6 mm
10 mm	105 A	2,200 mm/min	Ø 10 mm
15 mm	130 A	1,500 mm/min	Ø 15 mm
25 mm	200 A	900 mm/min	Ø 25 mm

Corten
Thickness	Amperage	Cut speed	Smallest clean hole
3 mm	45 A	3,400 mm/min	Ø 6 mm
6 mm	65 A	2,400 mm/min	Ø 6 mm
10 mm	105 A	1,800 mm/min	Ø 10 mm
20 mm	200 A	1,400 mm/min	Ø 20 mm

Hardox 400 / 450
Thickness	Amperage	Cut speed	Smallest clean hole
6 mm	65 A	2,100 mm/min	Ø 6 mm
10 mm	105 A	1,500 mm/min	Ø 10 mm
20 mm	200 A	1,150 mm/min	Ø 20 mm
30 mm	260 A	700 mm/min	Ø 30 mm

Galvanised sheet
Thickness	Amperage	Cut speed	Smallest clean hole
1 mm	30 A	6,000 mm/min	Ø 6 mm
2 mm	45 A	4,500 mm/min	Ø 6 mm
3 mm	45 A	3,400 mm/min	Ø 6 mm

Brass
Thickness	Amperage	Cut speed	Smallest clean hole
3 mm	45 A	2,200 mm/min	Ø 6 mm
6 mm	65 A	1,300 mm/min	Ø 6 mm
12 mm	105 A	650 mm/min	Ø 12 mm

Copper
Thickness	Amperage	Cut speed	Smallest clean hole
3 mm	45 A	1,800 mm/min	Ø 6 mm
6 mm	65 A	1,000 mm/min	Ø 6 mm
10 mm	105 A	550 mm/min	Ø 10 mm

Hole rule: make holes at least as wide as the plate is thick (minimum Ø 6 mm). Smaller holes can be marked for drilling.

Tolerance: typically ±1 mm on profile, with a slight edge bevel on thicker plate. Finishes: deburred edges or primer.

Speeds are typical values for air plasma and vary with consumables and machine.